On Thu, 28 Mar 2024, "Suesens, Sebastian" <sebastian.suesens@xxxxxxxxx> wrote: > Hello, > > I enabled the CMA (CONFIG_CMA=y) for an x86 machine on Linux kernel v5.10 and v5.15 When I boot the system the CMA reserved memory, but when the graphic card driver i915 or hda_intel is loaded the system crashed. > I see that ioremap on RAM at 0x0000000000000000 - 0x00000000d0000000 get fail. When I blacklist the i915 and hda_intel module the system boots fine with cma memory reserved. > > I think this has something to do with the shared memory which this driver use. > > Does anyone know if a kernel config or something else prevents this crash? If you can reproduce this with recent kernels, please file a bug as described at [1]. BR, Jani. [1] https://drm.pages.freedesktop.org/intel-docs/how-to-file-i915-bugs.html -- Jani Nikula, Intel
